12+7=19
13+7=20
14+7=21
23+7=30
12-4=8
13-4=9
14-4=10
23-4=19
Х×6=50+310
Х×6=360
Х=360÷6
Х=60
_________
60×6=50+310
5706*48:72-(2450021-368606):903+7558501=7 560 000
1)2450021-368606=<span>2081415
2)5706*48=</span><span>273 888
3)</span>273 888:72=3804
4)2081415:903=2305
5)3804-2305=1499
6)1499+7558501=<span>7 560 000
</span>